Publication detail

Rejuvenator influence on aged binder material properties

VARAUS, M. KOUDELKA, T. ŠPERKA, P.

Original Title

Rejuvenator influence on aged binder material properties

Type

conference paper

Language

English

Original Abstract

As the amount of reclaimed asphalt pavement (RAP) material used in asphalt mixtures has increased recently, it is vital to address problems regarding aged binder incorporated in RAP. Asphalt binder hardens during its production process as well as during service life of pavements. External influences such as oxygen and ultraviolet radiation affect greatly bitumen characteristics. Thanks to adding rejuvenating agents, the original binder properties should be recovered and resulting asphalt binder parameters should become equal to those measured upon the reference material. In this study, four different rejuvenator agents and one neat soft binder were employed to rejuvenate the artificially aged binder by a complete blending between both constituents. Thereafter, empirical as well as performance based binder properties were examined with a dynamic shear rheometer (DSR) and with a bending beam rheometer (BBR). Three different dosages of each rejuvenator were added to evaluate the required amount for the original binder properties to be restored. Moreover, the softening efficiency of each agent was assessed by means of the Ring and Ball test. Finally, the optimum amount of each rejuvenator needed for the blend to achieve the target specification was determined. It can be concluded that the rejuvenators affect binder properties greatly, and mainly in a positive way. However, the data also indicate significant discrepancies between the types of the rejuvenator.

Keywords

Rejuvenator, Bituminous aged binder, Rheological material properties, Bending beam rheometer, Dynamic shear rheometer.

Authors

VARAUS, M.; KOUDELKA, T.; ŠPERKA, P.

Released

18. 8. 2016

ISBN

978-3-03835-783-4

Book

Innovative Materials: Engineering and Application II

Edition number

730

ISBN

1662-9795

Periodical

Key Engineering Materials (web)

State

Swiss Confederation

Pages from

380

Pages to

389

Pages count

10

BibTex

@inproceedings{BUT129614,
  author="Michal {Varaus} and Tomáš {Koudelka} and Pavel {Šperka}",
  title="Rejuvenator influence on aged binder material properties",
  booktitle="Innovative Materials: Engineering and Application II",
  year="2016",
  journal="Key Engineering Materials (web)",
  number="730",
  pages="380--389",
  doi="10.4028/www.scientific.net/KEM.730.380",
  isbn="978-3-03835-783-4",
  issn="1662-9795"
}